Why the border of the circle drawn in canvas is not complete and clear ?

Question

https://code.sololearn.com/WyuQVZ7A6HfY/?ref=app

Answer 1

Try setting a higher line width

c.lineWidth = 2;

Answer 2

If you remove lines 14/15 the problem is fixed

Some more about this phenomena

https://medium.com/wdstack/fixing-html5-2d-canvas-blur-8ebe27db07da

Answer 3

that works thanks... what s the logic behind that ? m new 2 canvas

Answer 4

thnx a lot